FSK insulation tape is reinforced with fiberglass scrim with a foil, scrim, and Kraft laminate backing. The reinforced aluminum foil tape offers high puncture and tear resistance, ensuring a long life and durability in various conditions and applications.

FSK stands for Foil/Scrim/Kraft, which refers to the three layers of material that make up the tape. The foil layer provides a reflective barrier that helps to prevent heat loss, the scrim layer provides reinforcement, and the kraft paper layer provides a backing that helps to keep the adhesive from sticking to itself. It is a flame retardant, vapor-barrier, and it is one of the most commonly used facings in the insulation industry.

FSK insulation tape is a durable and weather-resistant tape that can withstand a wide range of temperatures. It is also a cost-effective way to seal and patch insulation, and it is easy to use. It can also be used for patching rips and tears in foil-facing insulation and can be used with fiberglass duct wrap for added strength.

FSK Tape Applications:

FSK insulation tape is used for sealing and patching FSK ductwork and insulation and provides a finished look for exposed HVAC systems.FSK is the basic insulation facing.

FSK Tape Features:

  • Scrim layer bends with the primary facing providing integrity to the insulation and a strong, finished, appearance.
  • Release liner provides easy removal for efficient application on the job site.
  • High-tack synthetic rubber adhesive forms an instant bond.
  • Moisture-, mold-, and UV-resistant design.

Tape Properties:





Backing Thickness



PSTC-133 / ASTM D 3652

Total Thickness

170 Micron


PSTC-133 / ASTM D 3652

Adhesion to Steel



PSTC-101 / ASTM D 3330

Tensile Strength

120 N/25mm


PSTC-131 / ASTM D 3759




PSTC-131 / ASTM D 3759

Service Temperature

-20℃ to +80℃

-4℉ to +176℉


Applying Temperature

+10℃ to +40℃

+50℉ to +105℉


Tape Roll Size:

Finish Roll:  

50mm x 50m     2” x 55yds

75mm x 50m     3” x 55yds

Log Roll:   1020mm x 50m                

Jumbo Roll: 1020mm x 3000m

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